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Finding the Fourth Proportional to 66,229.71, 91,399.41 and 37,940.87

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Solution

The fourth proportional to 66,229.71, 91,399.41 and 37,940.87 is: 52,359.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,229.71 : 91,399.41 = 37,940.87 : x
  2. Step 2: Convert to fraction form
    66,229.71/91,399.41 = 37,940.87/x
  3. Step 3: Cross multiply
    66,229.71x = 91,399.41 × 37,940.87
  4. Step 4: Simplify right side
    66,229.71x = 3,467,772,733.55
  5. Step 5: Solve for x
    x = 3,467,772,733.55/66,229.71
  6. Step 6: Final answer
    x = 52,359.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.